What water treatment do I need for a freshwater aquarium?

Most freshwater aquariums need a water conditioner to remove chlorine and chloramines from tap water. Depending on your tank's needs, you may also require pH balancers, ammonia removers, and bacteria supplements to keep water parameters stable and fish healthy.

Do I need a special water conditioner for freshwater tanks?

Yes, freshwater aquariums need water conditioners formulated specifically for their environment. These treatments neutralize harmful chemicals in tap water and support a safe, stress-free habitat for your fish.

Tropical Fish Tank Health & Water Care - Page 6 (Free Shipping)

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Dr. Tim's Aquatics AquaCleanse Freshwater Aquarium Cleaner, 16-fl oz bottle

$16.99 Chewy Price

($1.07/oz) Price per Unit

$19.99 List Price

$16.14 Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Dennerle Carbo Elixier Bio Aquarium Plant Fertilizer, 500-mL bottle

Rated 3 out of 5 stars

2

$27.50 Chewy Price

($0.06/mL) Price per Unit

Free delivery on first-time orders over $35
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Salifert Aquarium Potassium Test Kit

Rated 3 out of 5 stars

2

$16.79 Chewy Price

$18.81 List Price

$15.95 Autoship Price

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Reeflowers Aqua Plants All Inclusive Plant Fertilizer Fish Aquarium Water Conditioner, 2.9-fl oz bottle slide 2 of 7

Reeflowers Aqua Plants All Inclusive Plant Fertilizer Fish Aquarium Water Conditioner, 2.9-fl oz bottle slide 3 of 7

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Reeflowers Aqua Plants All Inclusive Plant Fertilizer Fish Aquarium Water Conditioner, 2.9-fl oz bottle slide 6 of 7

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Reeflowers Aqua Plants All Inclusive Plant Fertilizer Fish Aquarium Water Conditioner, 2.9-fl o...

Rated 4 out of 5 stars

2

$5.24 Chewy Price

($1.81/fl oz) Price per Unit

$6.28 List Price

$4.98 Autoship Price

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Fluval Fresh & Salt Calcium Fish Water Test Kit

$18.99 Chewy Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

API pH Freshwater & Saltwater Aquarium Test Strips, 25 count

Rated 4.4 out of 5 stars

10

$14.48 Chewy Price

($0.58/ea) Price per Unit

$18.28 List Price

$13.76 Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Dr. Tim's Aquatics AquaCleanse Freshwater Aquarium Cleaner, 64-fl oz bottle

Rated 4.7 out of 5 stars

3

$31.69 Chewy Price

($0.50/fl oz) Price per Unit

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Free delivery on first-time orders over $35
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biOrb Aquarium Maintenance Kit

Rated 5 out of 5 stars

6

$38.89 Chewy Price

$39.99 List Price

Free delivery on first-time orders
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ASF SeaTest PO4- Phosphate Fish Aquarium Water Test Kit, 40 count

$23.99 Chewy Price

($0.60/ea) Price per Unit

$27.99 List Price

Free 1-3 day delivery on first-time orders over $35
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Dr. Tim's Aquatics Shrimp Waste-Away Gel Water Conditioner, Small, 2 count

$19.29 Chewy Price

($9.65/ea) Price per Unit

$23.99 List Price

$18.33 Autoship Price

Free 1-3 day delivery on first-time orders over $35
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OASE Indoor Aquatics ScaperLine 3 Fish Soil, Black

Rated 5 out of 5 stars

1

$37.97 Chewy Price

($37.97/ea) Price per Unit

Free 1-3 day delivery on first-time orders
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Dr. Tim's Aquatics NP-Active Pearls Aquarium Cleaner, 3,785-mL bottle

$263.89 Chewy Price

($0.07/mL) Price per Unit

$250.70 Autoship Price

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Fritz Aquarium Water Nitrite Test Kit

Rated 3 out of 5 stars

1

$11.99 Chewy Price

$15.99 List Price

Free 1-3 day delivery on first-time orders over $35
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Fluval Phosphate Fish Water Test Kit

Rated 5 out of 5 stars

1

$18.99 Chewy Price

Free 1-3 day delivery on first-time orders over $35
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API Freshwater Aquarium Salt, 50-lb

Rated 5 out of 5 stars

4

$112.49 Chewy Price

($2.25/lb) Price per Unit

$157.48 List Price

$106.87 Autoship Price

Free 1-3 day delivery on first-time orders
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Underwater Treasures Seapora Volt-Control Titanium Grounding Probe

$12.99 Chewy Price

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Reeflowers African Trace Fish Aquarium Water Conditioner, 17-fl oz bottle

Rated 5 out of 5 stars

1

$12.49 Chewy Price

($0.74/fl oz) Price per Unit

$16.05 List Price

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Nature's Ocean Bio-Activ Live Aragonite Saltwater Aquarium Sand, Reef Substrate, 8-lb bag

Rated 4.5 out of 5 stars

21

$17.36 Chewy Price

($2.17/lb) Price per Unit

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Free 1-3 day delivery on first-time orders over $35
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Dr. Tim's Aquatics Clear-Up Freshwater Aquarium Cleaner, 4-fl oz bottle

$12.99 Chewy Price

($3.25/oz) Price per Unit

$15.99 List Price

$12.34 Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Dr. Tim's Aquatics Re-Fresh Freshwater Aquarium Cleaner, 32-fl oz bottle

$77.39 Chewy Price

($2.42/fl oz) Price per Unit

$73.52 Autoship Price

Free delivery on first-time orders
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Dr. Tim's Aquatics Shrimp First Defense Water Conditioner, 4-fl oz bottle

$11.29 Chewy Price

($2.83/fl oz) Price per Unit

$13.99 List Price

$10.73 Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Dennerle Deponit NutriBalls Aquarium Plant Fertilizer, 10 count

Rated 4.3 out of 5 stars

7

$10.00 Chewy Price

($1.00/ea) Price per Unit

Free delivery on first-time orders over $35
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Salifert Aquarium Oxygen Test Kit

Rated 4.7 out of 5 stars

6

$16.09 Chewy Price

$17.41 List Price

$15.29 Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Fritz RPM Elements Calcium Aquarium Water Treatment, 1-gal bottle

Rated 5 out of 5 stars

2

$29.99 Chewy Price

($29.99/gl) Price per Unit

Free 1-3 day delivery on first-time orders over $35
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Ruby Reef Rally NANO Formula Aquarium Water Treatment, 8-fl oz bottle

Rated 4.5 out of 5 stars

2

$8.99 Chewy Price

($1.13/fl oz) Price per Unit

$9.59 List Price

Free 1-3 day delivery on first-time orders over $35
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ASF SeaTest NO3- Nitrate Fish Aquarium Water Test Kit, 40 count

$20.29 Chewy Price

($0.51/ea) Price per Unit

$23.99 List Price

Free 1-3 day delivery on first-time orders over $35
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Reeflowers AquaPlants Trace Solution VI Aquarium Water Treatment, 34-oz bottle

$18.70 Chewy Price

($0.55/oz) Price per Unit

$23.94 List Price

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Dr. Tim's Aquatics One & Only Live Nitrifying Bacteria for Freshwater Aquariums, 16-fl oz bottl...

$98.89 Chewy Price

($6.19/oz) Price per Unit

$120.99 List Price

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Dr. Tim's Aquatics Re-Fresh Freshwater Tank Revitalizer, 8-fl oz bottle

Rated 4.7 out of 5 stars

6

$26.99 Chewy Price

($3.38/fl oz) Price per Unit

$39.99 List Price

$25.64 Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Reeflowers RemOrganics Fish Aquarium Water Conditioner, 17-fl oz bottle

$21.61 Chewy Price

($1.28/fl oz) Price per Unit

$25.96 List Price

$20.53 Autoship Price

Free delivery on first-time orders over $35
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Dennerle S7 VitaMix Vital Substances Aquarium Plant Treatment, 50-mL bottle

Rated 1 out of 5 stars

1

$12.99 Chewy Price

($0.26/mL) Price per Unit

Free delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics First Defense Freshwater Aquarium Cleaner, 128-fl oz bottle

Rated 5 out of 5 stars

2

$110.49 Chewy Price

($0.87/fl oz) Price per Unit

$104.97 Autoship Price

Free delivery on first-time orders
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ASF SeaTest KH Alkalinity Fish Aquarium Water Test Kit, 100 count

Rated 5 out of 5 stars

1

$18.89 Chewy Price

($0.19/ea) Price per Unit

$18.99 List Price

Free 1-3 day delivery on first-time orders over $35
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Fluval Nitrite Fish Water Test Kit

Rated 5 out of 5 stars

1

$16.99 Chewy Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Dr. Tim's Aquatics One & Only Freshwater Aquarium Cleaner, 32-fl oz bottle

$143.79 Chewy Price

($4.50/fl oz) Price per Unit

$136.60 Autoship Price

Free delivery on first-time orders
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Dr. Tim's Aquatics First Defense Freshwater Aquarium Cleaner, 4-fl oz bottle

$14.99 Chewy Price

($3.75/oz) Price per Unit

$14.24 Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Tropical Fish Tank Health & Water Care

Dr. Tim's Aquatics AquaCleanse Freshwater Aquarium Cleaner, 16-fl oz bottle

Dennerle Carbo Elixier Bio Aquarium Plant Fertilizer, 500-mL bottle

Salifert Aquarium Potassium Test Kit

Reeflowers Aqua Plants All Inclusive Plant Fertilizer Fish Aquarium Water Conditioner, 2.9-fl o...

Fluval Fresh & Salt Calcium Fish Water Test Kit

API pH Freshwater & Saltwater Aquarium Test Strips, 25 count

Dr. Tim's Aquatics AquaCleanse Freshwater Aquarium Cleaner, 64-fl oz bottle

biOrb Aquarium Maintenance Kit

ASF SeaTest PO4- Phosphate Fish Aquarium Water Test Kit, 40 count

Dr. Tim's Aquatics Shrimp Waste-Away Gel Water Conditioner, Small, 2 count

OASE Indoor Aquatics ScaperLine 3 Fish Soil, Black

Dr. Tim's Aquatics NP-Active Pearls Aquarium Cleaner, 3,785-mL bottle

Fritz Aquarium Water Nitrite Test Kit

Fluval Phosphate Fish Water Test Kit

API Freshwater Aquarium Salt, 50-lb

Underwater Treasures Seapora Volt-Control Titanium Grounding Probe

Reeflowers African Trace Fish Aquarium Water Conditioner, 17-fl oz bottle

Nature's Ocean Bio-Activ Live Aragonite Saltwater Aquarium Sand, Reef Substrate, 8-lb bag

Dr. Tim's Aquatics Clear-Up Freshwater Aquarium Cleaner, 4-fl oz bottle

Dr. Tim's Aquatics Re-Fresh Freshwater Aquarium Cleaner, 32-fl oz bottle

Dr. Tim's Aquatics Shrimp First Defense Water Conditioner, 4-fl oz bottle

Dennerle Deponit NutriBalls Aquarium Plant Fertilizer, 10 count

Salifert Aquarium Oxygen Test Kit

Fritz RPM Elements Calcium Aquarium Water Treatment, 1-gal bottle

Ruby Reef Rally NANO Formula Aquarium Water Treatment, 8-fl oz bottle

ASF SeaTest NO3- Nitrate Fish Aquarium Water Test Kit, 40 count

Reeflowers AquaPlants Trace Solution VI Aquarium Water Treatment, 34-oz bottle

Dr. Tim's Aquatics One & Only Live Nitrifying Bacteria for Freshwater Aquariums, 16-fl oz bottl...

Dr. Tim's Aquatics Re-Fresh Freshwater Tank Revitalizer, 8-fl oz bottle

Reeflowers RemOrganics Fish Aquarium Water Conditioner, 17-fl oz bottle

Dennerle S7 VitaMix Vital Substances Aquarium Plant Treatment, 50-mL bottle

Dr. Tim's Aquatics First Defense Freshwater Aquarium Cleaner, 128-fl oz bottle

ASF SeaTest KH Alkalinity Fish Aquarium Water Test Kit, 100 count

Fluval Nitrite Fish Water Test Kit

Dr. Tim's Aquatics One & Only Freshwater Aquarium Cleaner, 32-fl oz bottle

Dr. Tim's Aquatics First Defense Freshwater Aquarium Cleaner, 4-fl oz bottle

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